The term “warm-up” is often a misnomer. I sometimes think “pre-flight checklist” might be better, but it is still a misnomer. Still, a pre-flight checklist is a useful metaphor. Let me use this metaphor with a heavy get up. Before I begin a 62 pound get up, it’s important that I make sure that all systems are go. My knees are in good shape and not skinned up. My hands are in good condition, with no torn skin, sprained fingers, etc. that would compromise my grip. I am rested and do not have fatigue that would compromise my ability to pay attention to what I am doing. Etc. If I do not pass the pre-flight checklist, I do not do heavy get ups, period.